Question

Given below is a chemical reaction graph and a set of energy values.
1. Enthalpy change
2. Ea (rev)
3. Ea (fwd)
4. Energy of reactants



Arranged in increasing order, the above energy values are _____, _____, _____, and _____.

Answer 1

Increasing order: 1, 4, 3, 2.

(Enthalpy change < energy of reactants < Ea (fwd) < Ea (rev). ΔH is negative for the shown exothermic profile, Ea(fwd) is measured from reactants to peak and is smaller than Ea(rev) which is measured from products to peak.)